Question

If a 250mL beaker weighs 13.473g and the same beaker plus 2.2 mL of water weighs 15.346g. How much does the 2.2 mL of water, alone, weigh? Show your work for the calculation. Be sure to use significant figures.

Answer 1

To find the weight of 2.2 mL of water, subtract the weight of the empty beaker from the weight of the beaker with water; the result is 1.873 g, rounded to 1.9 g following significant figure rules.

Step-by-step explanation:

To determine how much the 2.2 mL of water alone weighs, subtract the mass of the empty beaker from the mass of the beaker with water. The calculation is as follows:

Mass of beaker + water = 15.346 g

Mass of empty beaker = 13.473 g

Mass of water = Mass of beaker + water - Mass of empty beaker

Mass of water = 15.346 g - 13.473 g

Mass of water = 1.873 g

The water weighs 1.873 g, which we round to 1.9 g to account for significant figures since the volume of water was given to two significant figures (2.2 mL).

Answer 2

Given :

A 250 ml beaker weighs 13.473 g .

The same beaker plus 2.2 ml of water weighs 15.346 g.

To Find :

How much does the 2.2 ml of water, alone, weigh .

Solution :

Now, mass of water is given by :

`\text{Mass of water alone = Total mass - Mass of beaker alone}\\\\Mass =15.346-13.473\ g\\\\Mass =1.873\ g`

Therefore , mass of 2.2 ml of water alone is 1.873 g .

Hence , this is the required solution .